Opinion
Scott W. Baker appeals from a judgment which was rendered after a jury returned a defense verdict in this action for personal injuries suffered by appellant when he was struck by an automobile which had been manufactured by respondent Chrysler Corporation.
On December 26, 1966, appellant was walking in the street near his home in Brisbane. It was about 6:30 p.m., and very dark. Appellant was walking up the street, facing the oncoming traffic, when a 1967 Dodge, with its headlights turned on, approached at about 35 miles per hour. Appellant turned and tried to cross the street in front of the approaching automobile. The driver swerved to the left into the oncoming traffic lane and braked, but was unable to avoid appellant. The speed of the car at the point of impact was approximately 20 to 25 miles per hour. Appellant was stmck on his upper leg by the aluminum molding around and above the headlight of the car, and suffered serious injuries. It was appellant’s theory at trial that his injuries had been increased by defects in the design of the front part of the car.
Conceptual design work on the car was completed in April 1963, and the engineering design work was completed in April 1965. There was conflicting evidence as to whether, in designing the front end of the automobile, Chrysler engineers had given adequate attention to the prevention of trauma to pedestrians who might be involved in collisions. The front end was designed with certain protmding metal in order to protect the headlights from damage; while other designs could have been used to protect the front headlights, there was testimony that there was no design or material which would have caused less injury to pedestrians than that which was actually used.
*715
Appellant contends that the trial court erred in giving an instruction which defined “defect.” The court instructed the jury: “A defective design is one which proximately causes or increases foreseeable and unnecessary injury to the user or to another in the course of the intended use of the product if the product can reasonably be designed and produced for its intended purpose without causing or increasing injury to the user or to another.” Manufacturers and designers of products are strictly liable in tort for injuries caused by their products when four elements are present: (1) the product is placed on the market; (2) there is knowledge that it will be used without inspection for defects; (3) the product proves to have a defect; and (4) the defect causes injury to a human being.
(Greenman
v.
Yuba Power Products, Inc.
(1963)
Appellant first asserts that the word “defect”—in the context of defective design—should not have been defined by the court at all. But if a correct definition is given, it is not error for the court to assist the jury by defining the terms used in the instructions. (See 4 Witkin, Cal. Procedure (2d ed. 1971) Trial, § 216, p. 3033.)
Appellant next asserts that the definition given by the court was incorrect in that it placed upon him a burden of proof inconsistent with the applicable law. The word “defect” is not capable of precise definition in all cases; “no definition [of defect] has been formulated that would resolve all cases or that is universally agreed upon.”
(Jiminez
v.
Sears, Roebuck & Co.
(1971)
The first part of the definition given by the trial court, “a defective design is one which proximately causes or increases foreseeable and unnecessary injury to the user or to another,” does not by itself constitute an adequate definition of “defect.” “[A] product need not be found defective simply because an accident has occurred.”
(Henderson
v.
Harnischfeger Corp.
(1974)
Appellant contends that the court’s instruction on assumption of risk was erroneous and should not have been given in any form. The court instructed: “There is a limited and restricted form of conduct on the part *717 of a plaintiff which, if you find to have occurred, will relieve a defendant from liability for damages caused by a defect or defects in its product: this conduct embraces your finding that plaintiff had actual knowledge of the specific defect or defects and knowingly, voluntarily moved his body into a position where it might be impacted by the defective part or parts of the vehicle.”
Appellant asserts that the evidence did not support the giving of any instruction on assumption of the risk. So long as there is any substantial evidence to support a theory advanced by a party, the court is justified in giving an instruction upon that theory.
(Rodriquez
v.
Lompoc Truck Co.
(1964)
However, the instruction given by the court required a finding by the jury that the plaintiff had actual knowledge of the alleged defect in the Dodge automobile, not actual knowledge that he was assuming the risk of being struck by the car. Appellant’s theory at trial was that the alleged defect did not cause the accident, or the initial injury to appellant, but *718 rather the defect increased the injuries suffered by appellant due to the accident. But assumption of the risk does not require “the clairvoyance to foresee the exact accident and injury which in fact occurred.” (Sperling v. Hatch, supra, 10 Cal.App.3d at p; 61.) The only knowledge required is that an injured plaintiff be aware that he is placing himself in danger. (Id.) The instruction, by requiring actual knowledge of the defect on the part of appellant rather than only knowledge that he was placing himself in danger of being struck by the automobile and injured, placed upon respondent the burden of proving more knowledge than was actually necessary to establish the defense; the instruction was therefore erroneous in that respect. Because the error unjustifiably increased the burden of proof upon respondent, it was hot prejudicial to appellant. (See Cal. Const., art. VI, § 13.)
Appellant also asserts that the instruction as given was a misstatement of the law, and that the jury should have been instructed that appellant had to appreciate the magnitude of the risk before assuming the risk and also that appellant must have acted unreasonably in assuming that risk. The doctrine of assumption of the risk requires that the injured plaintiff not only have general knowledge that he is placing himself in danger, but that he must have knowledge of the particular danger to which he is exposing himself.
(Vierra
v.
Fifth Avenue Rental Service
(1963)
The court also instructed the juiy that the only other element required for application of the doctrine of assumption of the risk was that appellant “knowingly, voluntarily” placed himself in danger. The mere voluntariness of appellant’s act, once actual knowledge has been shown, will not alone establish assumption of the risk; that act must be both voluntary and unreasonable under the circumstances of the case.
(Luque
v.
McLean, supra,
Appellant asserts that assumption of the risk is a defense which is applicable only against users or consumers of the product in strict liability cases, and is inapplicable to bystanders who are injured by the defective product. The public policy which enforces strict liability for manufacturing and design defects in favor of consumers and users also applies to bystanders.
(Elmore
v.
American Motors Corp., supra,
The judgment is affirmed.
Rattigan, Acting P. J., Emerson, J., * concurred.
A petition for a rehearing was denied March 17, 1976, and appellant’s petition for a hearing by the Supreme Court was denied April 22, 1976.
Notes
Retired judge of the superior court sitting under assignment by the Chairman of the Judicial Council.
